World War II by country

Nearly every country in the world participated in World War II, with the exception of a few states that remained neutral. The Second World War pitted two alliances against each other, the Axis powers and the Allied powers. The leading Axis powers were Nazi Germany, the Kingdom of Italy and the Empire of Japan; while the United Kingdom, the United States, the Soviet Union and China were the "Big Four" Allied powers.

Even though the Axis had the support of a handful of minor allies and client states, by 1945 almost every single country in the world had declared war on them, although many of them did so only at the eleventh hour.

The countries involved in or affected by World War II are listed here alphabetically, with a description of their role in the conflict.

Afghanistan maintained its neutrality. It was neither invaded nor sent an invasion force from or to a foreign nation, and was relatively unaffected during the war.

After the Italian invasion of Albania in April 1939, 100,000 Italian soldiers and 11,000 Italian colonists who wanted to integrate Albania into the Italian Empire settled in the country. Initially the Albanian Fascist Party received support from the population, mainly because of the unification of Kosovo and other Albanian-populated territories with Albania proper after the conquest of Yugoslavia and Greece by the Axis in Spring 1941. Benito Mussolini boasted in May 1941 to a group of Albanian fascists that he had achieved the Greater Albania long wanted by the Tirana nationalists. In October 1941, the small Albanian Communist groups established an Albanian Communist Party in Tirana of 130 members under the leadership of Enver Hoxha and an eleven-man Central Committee.

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